Name that stat technique
I wonder whether there is an interaction between gender and experimental condition on math test scores.
What is...factorial ANOVA
When the gender x experimental condition on math scores interaction was statistically significant.
What is...when controlling for the main effects of gender and experimental condition, the differences in means between experimental conditions depended on gender. This is true in the population as well.
I don't think your measure of happiness is an accurate measure of happiness.
What is...construct validity.
The p value in your independent t test is less than .01.
What is--the difference between the sample means did not occur by chance and there is a difference between these population means on the DV.
In my mixed-model ANOVA, I found that the average income for men was higher than the average income for women. Wrap words around this main effect?
What is...When controlling for the main effect of time and the time x gender interaction, the main effect for gender on income is statistically significant. That tells us that the population mean for men is higher than the population mean for women on income.
I wonder changes in weight from summer to winter differ for Asian Americans and Hispanic adults.
What is...mixed-model ANOVA.
When the main effect for time (3 time points) on height was not statistically significant.
What is...the differences in the sample means for height across the three times may have been due to chance and there is no difference in the population means.
Students did better on the test at the end of the year because they took the same test earlier in the year, not because they learned anything in school.
What is...practice effect, which can harm internal validity.
The critical F value for your ANOVA is 3.27
What is--the value your observed F would need to exceed to be considered statistically significant.
Why someone would do an ANCOVA rather than an ANOVA.
What is...because they wanted to control for the effects of one or more extraneous variables.
I wonder how much of the variance in Happiness scores is explained by marital status (married, single, or divorced).
What is...eta squared, the effect size for oneway ANOVA.
When the average GPA is higher for girls than for boys.
What is...the difference between my sample means did not occur by chance and the population mean for girls is higher than the population mean for boys on GPA.
I don't think your results will generalize to the broader population because you used a convenience sample.
What is...external validity?
Regression to the mean effect.
What is...Over time, scores tend to return toward their historic means, even if there are extreme scores from time to time.
A research question you would answer using a repeated-measures ANOVA.
What is...anything where you measure sample means of a single sample multiple times.
I wonder whether daughters are taller or shorter than their mothers, on average?
What is...dependent t test, 2-tailed
When the standardized regression coefficient for age predicting running speed is -.45, is statistically signfiicant, and a second predictor is weight.
What is...When controlling for weight, age is a medium-sized, negative, statistically significant predictor of running speed, and this relationship exists in the population.
Half your participants dropped out of the study before completing the Time 2 measure, and that may have affected your results.
What is...attrition effect.
Coefficient of determination.
The MSe if the SSe is 250 and you have four groups with 25 members in each group.
What is...(25 x 4) - 4 = 96. This is the dfe
MSe = 250/96 = 2.60
What is a better predictor of college GPA: high school GPA, overall SAT score, or family socioeconomic status?
What is...multiple regression.
When the Time x Grade Level interaction on stress is not statistically significant.
What is...When controlling for the main effects of Time and Grade Level on stress, in the population changes over time in mean levels of stress do not depend on what grade students are in.
How can you say high self-esteem causes higher academic achievement when self-esteem isn't even related to achievement?
What is...statistical validity?
The alpha level.
What is...the percentage of time you are willing to be wrong when you decide a result was NOT due to chance, but it really was.
"I'm taking the short final."
"What is...I'm content with the grades I got on the first three quizzes and I'm ready to be done."